How to get to Guayabo Archaeology Site
To get to the Guayabo Archaeology national monument (Monumento National de Guayabo), which is the largest discover archaeological site in Costa Rica, you can first go to the town of Turrialba and then take a bus to the park. You can catch a bus from the main bus terminal in Turrialba and go to the ticket counter that is farthest to the right that says “Guayabo” on the window.
The ticket should cost around 250 Colones (50 cents). You can then get on the bus at the farthest side of the station away from the ticket window.
There are buses at 8 AM, 11 AM, 3PM, and 5 PM. The last bus to return to Turrialba that goes by the park is at 4 PM. If you walk 5 KM down from the park to the main road there are more buses that go by. If you want to get on a bus that is going down the road just flag it down, the driver will stop.
I am told that there is camping at the park of $2, but I did not notice any signs of this.